Valve.



i Urran smarts PAT L FFCE.

BENJAMIN LEONARD GETMAN, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TQHARLEY COMPANY, F SPRINGFIELD, MASSACHUSETTS, A CORPORATION GFMASSACHUSETTS.

VALVE;

Patented Apr. 2, 1918.

Application ledDecember 5, 1917. Serial No. 205,652.

Y To aZZ whom t may concern:

Be it known that I, BENJAMIN L. GET- MAN, a subject of the Emperor ofGermany, but having declared my intention of becoming a citizen of theUnited States of America, residing at Springeld, in the county ofHampden and Commonwealth of Massachusette, have invented certain new anduseful Improvements in Valves, of which the following is aspecification.

This invention relates to improvements 1n valves or shut o devices forcrucibles. It is particularly designed for stopping the flow of moltenmaterial of low specific gravity, particularly aluminum, or any of vitsalloys. In the making of castings of aluminum, by what is known as diecasting, the metal is forced into the dies under considerable pressure,in fact, about 200 pounds per square inch. t has been found diflicult toeifectually shut orf the flow of the metal fromthe crucible to the moldafter the mold or die has been lled, resulting oftentimes in seriousinjury to the workman and loss of material by spilling on the floor ofthe foundry, requiring its being remelted and purified. Broadly, theinvention comprises a shut off valve which is preferably conical inform, that is inserted in the mouth or opening of the Crucible, which islocated over the mold. Encircling the seat portion of the valve is arib, preferably semi circular in cross section to provide a smallcontact or area with the opening of the crucible, whereby the ow ofmolten metal will be effectually shut od'. A further object of theinvention is to provide a valve which will permit the escape of theconfined air in the die or mold so that, as the molten material flows-into the die the air therein can readily escape. Broadly, this part ofthe valve is formed with an opening that is arranged in the axisthereof, the lower end of the opening having a plug formed oflaminations of rolled steel,'the space between the laminationspermitting the air to readily escape from the mold, but preventing` themolten metal from flowing therethrough.

Referring to the drawings: v

Figure l is a sectional view through the axis of the crucibleshowing theconical shapedplug or valve with the rib thereon, also the plug oflaminations located therein.

Fig. 2 is a transversesectional view on the line 2 2 of Fig. l showingthe air ducts in the body portion of the plug.

Fig. 3 is a horizontal sectional view on the line 3--3 of Fig. l showingthe threaded connection between the inner and outer por-` tions of theplug and also illustrating the air ducts.

Fig. 4 is a horizontal sectional view ,of the line ece-l of Fig. 1showing the arrangement of the inner andv outer portions of the plug inrelation to the mouth of the crucible. y

Referring to they drawings in detail: l

.designates the Crucible for containing the The mold ordie whichparallel withv the conical surfacel 7 `of the i mouth of the crucible.The plug 5 is formedwith a rib 8, which is located substantially onehalf of the distance between the upper and lower ends of theinclinedportion of the plug whereby an annular space between the plug and themouth of the Crucible is provided, as shown. vThis rib, it will benoticed, is made semi circular in form so that only a small area ofcontact engages the surface 7 of the opening in the crucible. This ribis made semicircular for the purpose of spacing the plug from theopening in the Crucible asindicated above at 2, and, on account of thenarrow passageway between the plug and the inner wall of the mouth ofthe crucible, only a small quantity of molten material will flow downinto the annular passageway above the rib 8,v thus preventing the mouthof the Crucible becoming extremely hot.` Or, in other words, keepingthis part of the crucible `comparatively cool'and also the ribs 8. It

as aluminum, which liisg. largelyj used in.v dief;- Wlienf: the plug," 5raisedmthea,

casting; molten material flows into the mold 3 under the. pressure lthatthe ,plug 5 is i fonruedI withian axial-opening 9.1theeloweri.

part'of which is made conical; In this open-l Aing is located a'stem 10ormedfwithgrooves v '1 1 and `with passageways 11, which open intogrooves' 11;"V Theconical openingglQ"in-V f 'the plug 5 lisf filledywith* a similiar'Y2 shapedA plugv preie'rablyV composed of laminations lof rolled steel*V 1ndi'cated"" at A'13,. vwhich?n are heldV togetherbyjmeansl of rivets lll." lI haver found in practice thatV the lower endoffth'eA lalln'inations13, 'at the sprue or, 'opening' 4 vof "themoldmay possiblybe slightly coated" with a thiniln"oil-molten""metalf'afterthe die or mold yis, illed,but'thene2t `timethat a die, or mold, is filled the ,incomingjpmolr e ten metal`will"caus eij it" to :be instantly@re- Y, moved and fthe e air.confined linrthe. die, oriv moldfwill escape.;A The 'air'passagesbetweenL the laminae' of the plugareiverysmall, not:

overone-or two thousandths of an inchgand' eliectually` prevents any ,ofthe molten "metal gaining access to the spaces;` betweenw thelaminations.'v The purpose o'usingjlamina tions is to allow, theconnedair inthe mold 3 l to readilyjescape "throughl the fp assa'geways-11'.. tand 1I,"` but will, at the same',time,pref vent the moltenvmaterial from flowing iup--l ward lthrough the opening 1121ini `,which Ethe laminated plug is placed. The passageways 11 f'le'ad into` smaller.Vpassagewa-ys' 'V15 at "the ingp upper endfof thesplug 5' and jfrom'thereto the atmosphere.

i auch themouthfof "the icrucible, themo'lt'en material- 'willlowdown'through tthe.V open: e the Vcruciblein a comparatively'small'stream and in this way` the volume Vofthe i How willbe Y, easilyregulated. i I Should *the tualljfl seal the yflow of Ythe'.materialafter they plug lfis forced .downwardf tthiszfplufg may" berotated about lits 'axis tov grind pthe 'Y semicircular r1'b"8to` itsseat; Shuld'ffany e off; also one that will permit thel escape of isnormally exerted on the lclosed `orucible.j. The coninediair.. in the'lmold must be -allowedto escapeas quickly Y' as `Vpossible `and inV orderto provide aready means to allow of this escape,

The" threaded fend "l'prof Y vides aycon'nectlon' fr asuitablel'eXtension piece r thatv will" 'eXtendQra :considerable"dis:`tancev above thefcrueiblei Vl'.u hereby theplug Y opening of a Crucibleand one that will eifectualily prevent leakage. *whenl moltenvr materahovl'ow specifici' gravity is :to beishut the coniinedair the .molds asvthematerial isfforced into'theinold':

'Vhat'Itcl'aimisa 5 f l.V A valve for a cruclblelitorshutting -the flow,ofV molten material comprising a e,"

conical shaped member-having a smooth sur;v

face whichis formed'withi a singleribhati f substantiallyamidz-wvay ofthe vertical length.

of the conical shaped portion-Ofi'said mem-V ber, said rib beingfsemicircularunfcross sec.v so tlon, saldiri'bebe-ing designedtocengage aiplug'fffrom the surface ofy the {ope/ning, Vwhere-"f Yafti'ghtjointfbetweentheplug andtheopen: iIi'go-tliefcruoiblesflv l f f2 Inf a lole'vi'ce-V of 'the L kind described, fthe Y combination, withthe*foiltlatiopening;fotf*al crucible"havingfaiconicalfish-apedgmouthgfa 90- f l plugfor@lthefopeningfandofisiniilanconforv e mationgbutlpfflesse diameter thani the. outlet' of the opening fof lthe ffcrucible;a` rib onfthe means-to-permitrthe'airconfinedainsthe'imold 105 toescaplefthroughithelplug asthefmetahis K introducedgintorthemoldiunderlpressurasaid: means? comprising` a f conical. shaped. plugfornied-lofjflaminatins tofpermitstheirairrto flow upwardftherethmughSand. at. 1the `same 110 time-tdfprevent the :flowi ofi molten:materialeV f L1A-plug? forrclosing fltheuopening: of a cruciblel,comprisingfafccnieal .shaped m'ern-l o berormedfiwith'aniopening.therethi'oughv; a plug ",ivithin'the'opening and.having .a stem 115 formedwith groovesto prov-ide-airpassages,said-"plugrbeing 'formed-:fwith .laminations e and l fitted intoA theopening of the. plug. f

In a-devicePoffthefkndfidescriloed,4 a I plug havingaaconi-ealshaped-end,a frib dis 120 p'osed-.at-y substatntia'll'vEmidway of the 'lengt-"h of the Ip'lu'g land f integralr therewithf: foriengag'mg a fconic'al shapeddoutletfopening tot' a cruciblegl'wherebyAYgthel 'fb ody 'off jthe "plug tis spaced `from vtherinneriwallisurface'fof .fthe 125 Lopening v4bothabf've and lbelowthe\vrib to4 provide@ a narrciw` annularpassage,said ribbe ingsemi-circularzinicrosslsectionfto'provide' a comparatively narrow seatarea between the opening comprising a plurality of lamithe plug and themouth of the Crucible. nations formed of thin sheet steel suitably 6. Ina plug for closing the mouth of a secured together to permity theconfined air 10 Crucible which contains molten material of within a moldto escape and prevent the 5 low specific gravity, as aluminum, anopenflow of molten material, means to permit the ing in the plug, thelower part of the openconfined air to escape from the plug. ing beingmade conical, means for closing BENJAMIN LEONARD GETMAN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

